I find myself increasingly drawn to album covers that evoke a sense of desertion, emptiness, and which are oddly plain, bald. French avant-garde specialists Ici, D’ailleurs are particularly good in housing albums in covers of this type, with their ‘Mind Travels’ series, of which this is number eleven, being particularly noteworthy (and the tri-fold cover with a thick spine is especially nice). On the one hand, the cover art gives nothing away. On the other, it created a certain sense of emptiness and foreboding, which perfectly describes the music it houses.

Mysterium Coniunctionis – the product of a collaboration between Thighpaulsandra (who featured on many Coil albums) and Massimo Pupillo (who built his reputation as bassist with Zu, and has continued to expand it working with Eugene Robinson and as part of Triple Sun) – is dark and foreboding, and more.

The press blurb explains the album’s purpose neatly, so I shall quote: ‘Mysterium Coniunctionis makes direct reference to the eponymous and testamentary work of the psychiatrist Carl Jung, subtitled An Inquiry into the Separation and Synthesis of Psychiatric Opposites in Alchemy. It clearly reflect the duo’s intention to create particularly immersive and meaningful music from supposedly opposing materials’.

Mysterium Coniunctionis contains two tracks, each around the twenty-minute mark in terms of running time, and corresponding with one side of an album apiece. Halfway through the first, ‘Sagyria’, my wife wandered into my office and said she was worried there was something up with the motor on the dehumidifier before realising the uncomfortable humming was emanating from my speakers. Humming, throbbing, deep and resonant tones dominate both compositions.

There’s minimal movement across the album as a whole, and listening digitally the tracks bleed together to form an extended, expansive soundscape that pushes discomfort, a sense of disquiet and tension. Always tension. Some fourteen minutes into the second track, ‘Solve et Coagula’, the sounds reaches a shivering, spine-tingling level of intensity and density. It’s all in the frequencies, as the midrange and treble loom to the fore and get uncomfortable – really uncomfortable.

The ‘opposing materials’ which form the fabric of Mysterium Coniunctionis are the digital and analogue: in combination, they forge a dense and unsettling sound that eddies and whirls and tunnels into the inner regions by stealth.